EP 1804984 B1 20100414 - PRE-TENSIONED SAND CORE
Title (en)
PRE-TENSIONED SAND CORE
Title (de)
VORGESPANNTER SANDKERN
Title (fr)
NOYAU EN SABLE PRECONTRAINT
Publication
Application
Priority
- US 2005030392 W 20050825
- US 60462104 P 20040825
Abstract (en)
[origin: US8397789B2] Provided are methods of replacing drilling holes in castings by pre-tensioning sand cores. These methods are used in long cylindrical shaped sand cores in cold core box processes. The urethane sand core is placed in compression to increase the core strength during handling, placing inside of the mold. The pre-tensioned urethane sand core is set in a casting mold so as to form a cavity in the casting mold. The molten metal is poured to form the cavity inside of the casting. The pre-tensioned urethane sand core maintains its initial shape during casting.
IPC 8 full level
B22C 9/00 (2006.01)
CPC (source: EP US)
B22C 9/106 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006026423 A2 20060309; WO 2006026423 A3 20070222; AT E464136 T1 20100415; AU 2005280105 A1 20060309; CA 2583505 A1 20060309; CN 100579686 C 20100113; CN 101065200 A 20071031; DE 602005020665 D1 20100527; EP 1804984 A2 20070711; EP 1804984 A4 20081015; EP 1804984 B1 20100414; JP 2008510627 A 20080410; JP 4567739 B2 20101020; MX 2007002323 A 20071010; US 2008257515 A1 20081023; US 8397789 B2 20130319
DOCDB simple family (application)
US 2005030392 W 20050825; AT 05792459 T 20050825; AU 2005280105 A 20050825; CA 2583505 A 20050825; CN 200580034799 A 20050825; DE 602005020665 T 20050825; EP 05792459 A 20050825; JP 2007530159 A 20050825; MX 2007002323 A 20050825; US 66102305 A 20050825